Egit pull and fetch from upstream

I created a new branch A to do some work from the wizard, and did some work and made a local commit.

Then I created branch B to do some work from the wizard, and did some work and completed it. Then I combined it for mastering and clicked upstream on the main server.

now I have switched back to branch A. So, to roll back the latest changes, which option should I use in egit? removed from an upstream or exhaust device?

and what is the difference?

I do not want to randomly select, since I do not want to overwrite the changes ...